From a971254d6756b1bcb78d9ac7a98789e995792a7a Mon Sep 17 00:00:00 2001 From: Subrata Banik Date: Thu, 18 Jan 2018 15:20:21 +0530 Subject: soc/intel/cannonlake: Port SD Controller W/A from Intel Reference code Solution: To do an additional config read to the SD controller after the controller has been power gated (put to D3) Change-Id: Ia2438c767332b0e2d413c71b06b052bf9ab4a96c Signed-off-by: Subrata Banik Reviewed-on: https://review.coreboot.org/23313 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/soc/intel/cannonlake/acpi/scs.asl | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/soc/intel/cannonlake/acpi/scs.asl b/src/soc/intel/cannonlake/acpi/scs.asl index a9fd35e1b9..61f1739e86 100644 --- a/src/soc/intel/cannonlake/acpi/scs.asl +++ b/src/soc/intel/cannonlake/acpi/scs.asl @@ -51,23 +51,34 @@ Scope (\_SB.PCI0) { Device (SDXC) { Name (_ADR, 0x00140005) + Name (TEMP, 0) OperationRegion (SDPC, PCI_Config, 0x00, 0x100) Field (SDPC, WordAcc, NoLock, Preserve) { - Offset(0xA2), /* Device Power Gate config */ + Offset (0x84), /* PMECTRLSTATUS */ + PMCR, 16, + Offset (0xA2), /* PG_CONFIG */ , 2, - PGEN, 1 /* PGE - PG Enable */ + PGEN, 1, /* PG_ENABLE */ } Method (_PS0, 0, Serialized) { Store (0, PGEN) /* Disable PG */ + + /* Set Power State to D0 */ + And (PMCR, 0xFFFC, PMCR) + Store (PMCR, ^TEMP) } Method (_PS3, 0, Serialized) { Store (1, PGEN) /* Enable PG */ + + /* Set Power State to D3 */ + Or (PMCR, 0x0003, PMCR) + Store (PMCR, ^TEMP) } } /* Device (SDXC) */ } -- cgit v1.2.3